Does talking someone else out of an impulse purchase count? I visited a coffee shop yesterday with some friends. I don't drink coffee, so I split a pastry with my husband. One of the friends spotted a branded, insulated tumbler on the shelf, picked it up, and said, "ooh, this is neat."
I urged her to check any thrift shop or free group. That kind of thing is a preferred promotional swag item at the moment, and if she doesn't mind either ignoring a random company logo or covering over it with stickers, she could get something equivalent for a lot less than the $30 or whatever they were asking. (Heck, I could give her one of our extras.)
I should have asked (and I still should) if she has a job lined up, or the means to take a break or what. I've heard she's leaving pretty soon. Her current job in the nonprofit sector was more for job satisfaction and less for great pay. Unfortunately, current-place management seems to have lost sight of the job satisfaction part and is driving even previously devoted staff to leave, and both the bad management and the fallout from it is bugging a lot of longtime volunteers. Fortunately, I've seen many alumni go on to other good jobs, so I hope that something works out for her.
At any rate, she didn't buy the thing, so maybe she'll at least have that $30 in her pocket a while longer.